Speed-controlling mechanism for motor-vehicles.



EATENTED FEB. 11, 1908.

e. W. DUNHAM. SPEED CONTROLLING MEGHANISM FOR MOTOR VEHICLES.

APPLIGATION FILED MAR-18, 1907.

.FFICE.

GEORGE W. DUNHAM, OF LANSING, MICHIGAN, ASSIGNOR TO OLDS M013". v" ORKS,' OF

LANSING, MICHIGAN, A CORPORATION OF MICHIGAN.

SPEED-CONTROLLING MECHANISM FOR MOTOR-VEIHCLES.

To all whom it may concern: I

Be it known that I, GEORGE W. DUNHAM, a citizen of the United States of America,

residing at Lansing, in the county of Ingvii ham and State of chigan, have invented certain new and useful Improvements in Speed; Controlling Mechanism for Motor- Vehicles of which the following is a specification, reference being had therein to the accompanying drawings.

It is the ob ect of the invention to provide means whereby the throttle of an engine may be set so as to drive the vehicle at a certain speed, and also to provide means whereby the speed may be at any time temporarily accelerated and returned again to the normal rate for which the throttle is adjusted.

To this end, the invention consists in a proved controlling mechanism is associated.

A is the dash of a motor vehicle, B is the steering stem, and O the inclined portion for the foot-board upon which said stem is mounted.

D is,a stem parallel to the steering-stern B, and E is an arm or lever at the upper end of said stem D, by which it may be rocked into difierent positions of adjustment.

F is a lever ful'crumed at G beneath the foot-board, and having an arm H connected by a rod I to the throttle (not shown). The opposite arm of the lever F extends adjacent to the stem D, and is provided with a bearing, preferably a roll J, which engages a cam bearing K attached to the stem D. This cam, when adjusted by the rotation of the stem, will shift the lever F, and through the rod I adjust the throttle, but in eachintcrmediate position of adjustment said lever F is capable of a further movement, that is, it can be rocked, out of contact with the cam J.

Specification of Letters Patent. Application filed March 18, 190 Serial No. 362.904:-

' venient location, and is prefera For eflecting this further and independent adjustment of the lever F, a foot actuated button, or push rod, L is arran ed in a conhly attached at M to the lever F Thus,the operator,having first set the cam K by an adjustment of the lever E, so as to give the desired degree of opening to the throttle, may at any time further open the throttle by pressing upon the button L. As soon as the pressure is relieved, the lever F is returned by a suitable means, diagrammatically illustrated, as a spring N, attached to the arm H, the cam K operating as a stop to limit the return movement. j

From the description above given, it will be understood that the lever F controls the throttle through its entire range of adjustment, butthebutton L is merely an acce erator, the parts always returning after its operation to the point of adjustment previously determined by the setting of the lever E.

The rotary stem 1) may be associated with a concentric stem M, preferably passing centrally therethrough, and employed for adjusting the sparking mechanism. stem is connected by means of a suitable lever system 0, P and Q with a connecting rod it leading to the sparker, (not shown).-

VVhat .l claim'as my invention is:

1. A controlling mechanism for motor vehicles, comprising ahand-operated rock shaft, a cam mounted thereon, a throttleactuating lever having a hearing at one end thereof upon said cam, a foot operated de- PatentedjFeb. 11,1908.

This.

vice for independentlyactuating said lever to separate the same from said cam, and yield able means for returning said lever and pressing the same against said cam.

2. A controlling mechanism for motor vehicles, comprising a handopcrated rock stem, the cam 1i. mounted thereon, the lever F having one arm thereof bearing against said cam, and another armconnected for actuating the throttle and the foot push rod L connected to said lever, substantially as, and for the purpose set forth...

In testimony whereof I atiix my signature in presence of two witnesses. 

